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describe new locale modifier @cjkwide for user guide

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Thomas Wolff 2018-03-08 00:29:25 +01:00 committed by Corinna Vinschen
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commit e4c65b2e91
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winsup/doc/setup-locale.xml
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@ -166,6 +166,19 @@ can be used to force wcwidth/wcswidth to return 1 for the ambiguous width
characters.
</para></listitem>
<listitem><para>
For the same class of "CJK Ambiguous Width" characters, it may be
desirable to handle them as double-width even when a non-CJK language
setting is selected. This supports e.g. certain graphic symbols used
by "Powerline" and provided by "Powerline fonts". Some terminals have
options to enforce this width handling (xterm -cjk_width,
mintty -o Charwidth=ambig-wide, putty configuration) but that alone
makes character rendering and locale information inconsistent for those
characters. The locale modifier "@cjkwide" supports consistent locale
response with this option; it forces wcwidth/wcswidth to return 2 for the
ambiguous width characters.
</para></listitem>
</itemizedlist>
</sect2>